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n. commercial trade, business, movement of goods or money, or transportation from one state to another, regulated by the federal government according to powers spelled out in Article I of the Constitution. The federal government can also regulate commerce within a state when it may impact interstate movement of goods and services and may strike down state actions which are barriers to such movement under Chief Justice John Marshall's decision in Gibbons v. Ogden (1824). Theoretically commerce is regulated by the Interstate Commerce Commission (I.C.C.) under authority granted by the Interstate Commerce Act, first enacted by Congress in 1887. This authority has been diffused among various federal agencies, and the I.C.C. may soon be history.